pygame and livewires, small problem

I am reading the book "Python Programming 2nd Ed. for the absolute beginner" and I am having some trouble with a very simple program. I was instructed to download and install pygame and the livewires package as I have done. This program is meant to display a grahical window, that's it. But I'M getting the following error with the following code.

Yes, i have the solution. You have a typo ;) I'm learing from the same book, loving it, i'm on chapter 12.
games.Screen.mainloop(). Thats what you've got.
games.screen.mainloop(). Thats what you need (notice the capital letter S?)
Livewires rules :)